Typewriting machine



June 16,1931; w. A. DOBSON TYPEWRITING MACHINE Filed 001;. 29, 1925 /fly.

Patented June 16, 1931'.

unrren era-res WILLIAM A. DdBSON, OF BBIDGEPOR'L. CQNNECTICUT', ASSIGNOR TO UNDERWOOD ELLIOTT CQIJIPANY; OF 'NEW YOBK, N. Y., A COREOBATION OF DELAWARE' rYrEwnIrING MACHINE Application filed October 29, 1925. Serial No. 65,524;

This invention relates to typewriting machines, and has particular reference to the provision of means for securing a typewriter to a baseboard, the invention being parties ularly suitable in connection with the mounting of portable typewriters, wherein erably provided with a plurality of sockets for receiving the usual cushion-feet of the typewriter-frame, whereby to definitely positionthesame in-relation to the improved anchoring means. The anchoring means provide for the'articulation of the frame upon the baseboard and may include a rigidly-mounted hook, disposed at the rear of the baseboard, having a forwardly-em tending portion to engage an opening in the rear wall of' the frame and, a pair of brackets at the front of the frame spaced off in triangularv relation to" the hook and cushion-feet.

through which. extend fastening screws anchored in the baseboard and carrying coil springs whereby adjustable yielding pressure is exerted on the brackets against the The contacting portions of the frame and baseboard may preferablybe lined with felt, rubber or other sound-deadening,material, whereby shocks incident to the operation of the typewriter may readily be absorbed.

Other features and advantages will hereinafter appear.

In the accompanying drawings, I Figure 1 is a transverse vertical sectional view through an embodiment of my inven tion, takenon the line 11 of Figure 3.

Figure 2 is a vertical-longitudinal sectional view on'the'line 22of Figure 3.

Figure 3 is a top planview, showing a typewriter-frame mounted upon a baseboard in accordance with the invention.

Figure 4 is a plan view on a smaller scale of the baseboard" per se.

In carrying out the invention, I provi e a baseboard 10, having a plurality of recesses 11 in its upper surface to form sockets for the reception of resilient feet 12 fastened by screws 13 to a typewriter-frame 14.

Metallic reinforcing bushings 15'are pref+ erably mounted in the baseboard 10 andinternally threaded for the reception of anchoring screws 16, holding an upstanding hook-member 17 adjacent the rear; of the baseboard 10., A forwardly-offset portion Paren'roericn 18 of the'hook-member 17 engages within an elongated opening 19 in the rear wall 20 of the typewriter-frame, and may preferably be covered with sound-deadening material 21, such as rubber or the like, for the purpose of absorbing vibration. Y I

'Laterally-extendingbrackets 22 "are secured to the front wall 23 of thetypewriter frame andat eachside thereof,as best shown in Figure 3, said brackets being held to the frame by screws 24. Disposed between the lower edge of eachibracket 22 and the upper edge of the baseboardlO is a piece of sounddeadening material '25, which absorbs the shocks incident to depression of the keys'of' Anchoring screws26 exthe typewriter. tend through the brackets 22 to provide supports for coil springs 27 disposed between the heads 28 of the. screws 26 and felt washers 29. actingagainst the brackets 22, which structures serve as resilient gages for limiting upward shifting of the frame. The coilsprings 27 are normally under compression.

In applying the typewriter to the baseboard 10, it is first positioned with the cushion-feet12 in line with therecesses 11 whereupon the front end'of the typewriterframe is tilted upwardly a slig t degree sufficient to enter the forwardly-offset portion 18 of the anchoring hook 17 in the opening 19 of the typewriter frame. Thereuponthe frame leis moved rearwardly a sufficient amount to align the brackets 22 for the insertion of theanchoring screws 26, which may be screwed down any desired amount, dependent upon the conditions of, useofthe machine.

The baseboard l0 preferably consti- I tute one side of a protectivecasing fora portable typewriting machine, (said. casing usually including a cover 10), in which case it may have a circumferential bead 30 and resilient feet 31 to prevent damage to the surface of a desk or other piece of furniture upon which said casing may be placed. From the foregoing, it will be evident that I have provided a novel baseboard-mounting for typewriting machines, which will be particularly applicable to use with portable typewriters, and that the invention, when so used, will effectively absorb accidental shocks and strains incident to the transportation as well as the operation of the typewriter.

It will be noted that means are provided for a convenient articulation of the machineframe to the baseboard by a triangular arrangement of the frame-securing elements; that in the present form this articulation includes a single interlocking member at the center of the back frame and a pair of spaced-off resilient members at the front of the frame; that this articulation of the frame upon the baseboard also provides for an ideal distribution of the frame-anchoring means to deaden the noise of typing; that these frame-securing elements include sounddeadening means that break up the metallic contact of the frame with the baseboard; that certain of the framesecuring elements may be made adjustable to compensate for variations in manufacture and render all machine-frames interchangeable with a base-mounting; and that the frame-securing elementsdo not interfere with the operation of the machine when it is desirable to operate the machine without the baseboard.

However, the practical effect of the rear hook is to form a fulcrum or rigid hinged member for the frame, while springs upon the forward frame-brackets constitute, along with the anchoring screws, resilient and adjustable stops for limiting the movement of the frame in swinging out from the baseboard when the latter is jarred, and returning the frame to normal position wherein the brackets rest upon their pads. While herein a triangular arrangement between the three points of attachment is apparent, yet the rear hook together with a single front bracket and only one retaining screw and spring might be used instead of two of each of the latter, as shown. The rear hook then acts to direct or concentrate the strain, incident to the impacts to which the baseboard is subjected in rough handling, toward.the resilient stops, and thereby prevents the tearing out of the retaining screws and their sockets from the baseboard. In addition, the hook allows the frame to slide slightly off and onto the same in its swinging movement when jarred.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. The combination with a typewriterframe having depending legs, and a baseboard for mounting the frame and receiving the depending legs, of a forwardly-extending hook mounted on the baseboard and engaging an opening in the back of the frame to provide a pivotal anchorage for the frame at its back, anchoring screws set in the baseboard and extending through brackets at the front of the frame, and coil springs directly held down by the screws against the brackets to absorb shocks by permitting the frame to swing out a distance from the board upon said-hook as a pivot. V

2. In a portable typewriting machine having a frame and a baseboard for supporting the same, the combination with a rigid retaining hook on said baseboard with which an extreme portion of said frame may be slid into engagement so that the hook will positively retain the frame and constitute a fulcrum upon which the frame may be swung from the baseboard, of means spaced from the hook and associated with both the frame and the baseboard for limiting the arc of movement of the frame in swinging from the baseboard.

3. In a portable typewriting machine having a frame and a baseboard for supporting the same, the combination with a rigid hinge-member secured upon the baseboard and pivotally engaging the frame to permit the frame to swing upon the same from the baseboard, of means spaced from the hingemember for limiting the swing of the frame, including a resilient stop associated with the frame and the baseboard and normally holding the frame down toward the latter, there being auxiliary means for absorbingnoise associated with the stop and with the hingemember.

4. In a portable typewriter having a frame and a baseboard for supporting the same, the combination with a pivotal anchorage for the frame secured upon the baseboard, of a resilient shock-absorber spaced from the pivotal anchorage and associated with the frame and the baseboard in order to permit the frame whenjarred to swing out in limited manner from the baseboard and be further limited in movement by the pivotal anchorage connected thereto.

5. In a portable typewriting machine having a supporting baseboard forming part of a transporting case, the combination with pivotal means for detachably securing the rear of the machine to said baseboard, of means at the front of the machine, associated with the machine and baseboard, to limit the swing of the machine on said pivotal means and co-operate with said pivotal means to lock the machine to the baseboard and tensioned springs which are additionally tensioned by said swing.

6. Ina portabletypewriter having a machine within a light transportation baseboard of great area and having light and weak construction, for use with a cover,

means detachably-fastening said machine to said baseboard to permit slight separation, including a hook-and-eye construction at the rear of the machine, anchorages in the baseboard at the front of the machine, detachable fasteners secured to said anchorages,

and tensioned springs between the fasteners and the machine, said springs being additionally tensioned during such separation,

to cushion shock and thereby prevent the anchorages from being pulled out of the baseboard when the encased portable typewriter in dropped upside down upon table or floor.

7 In a portable typewritinmmachine having a frame and a weak baseboard for supporting the same, said baseboard forming part of a transporting case, the combination with a bracket rigidly secured to the front of the frame, of a sound-absorbing pad interposed between the bracket and the baseboard, headed adjustable retaining screws associated with the bracket and threaded into bushings anchored in the baseboard, tensioned springs arranged between the head of the screw and the bracket, and distinct means associated with the rear of the frame and the baseboard for directing the strain-ofthe shocks and jars to said springs, said springs being additionally tensioned by movement of the machine away from the baseboard as aresult of concussion.

V 8.'In a portable typewriting machine having a frame and a weak baseboard upon which the frame is fastened, said baseboard forming part of a'transporting case, the combination with headed adjustable fastening screws passing through the frame, bushings into which the screws are threaded, said bushings anchored in the baseboard, of springs on said screws between the screwheads and said frame and effective to be compressed by said screws to a greateror less extent to secure the frame to the baseboard, said springs being additionally tensioned by said movement, to prevent the -machine from tearing the bushings out of the baseboard, the machine being slightly movable away from the baseboard when droppedupside down on the floor.

9. In a portable typewriting machine having a frame and a baseboard upon which the frame is mounted, said baseboard forming part of a transporting case, and also having resilient feet between the frame and the baseboard, and lugs on the frame, having apertures therein, the combination of headed adjustable I screws fastening the frame to the baseboard and passing through said apertures, springs on said screws between the screw-head and the, frame, said screws beingeffective to adjust the springs for" different degrees of resiliency against the lugs in opposition to the resiliency of thefeet, and bushings. into which the screws are threaded, the machine and baseboard being slightly separable, toput additional tension on the springs, to minimize concussions and prevent the bushings from'tearing outv of the baseboard.

10. In a portable typewriting machine having a supporting baseboard forming part of atransp'orting'case, the combination with pivotal; means for hinging the machine to the baseboard, of a pair of resilient movement-limiting supports for said machine, spaced tri'angularly with reference to the pivotal means, and co operating with the latter to lock the machine to the baseboard, said supports having tensioned springs which are additionally tensioned by the relative movement of machine and baseboard. 11. In a portable typewriting machine having a frame and a light and weak baseboard for supporting the same, said baseboard forming part of a transporting case,

the combination with. a pair of spacedbrackets rigidly secured to the frame, of headed retaining screws associated with the brackets and threaded into'anchorages provided in the baseboard, and tensioned springs mounted on the screws between the heads thereof and the brackets in order to resiliently hold the frame down on the baseboard and form adjustable stops to limit the movement, .said springs being additionally tensioned by said movement, to absorb the impact of the mass of the typewriting machine andthereby prevent the anchorages from being torn out of the board when the invertedmachine is subjected to downward concussion.

12.. In a portable typewriting machinehaving a frame and a weak baseboard for transporting the same, said baseboard forming part of a transporting case, the combination with a pivot-support for said frame, secured to the baseboard at the rear, of resilient anchorage at each side of vthe frame, near the front thereof, spaced from said support, and co-operative with said pivot to lock the baseboard detachably to the frame, and including tensioned springs which are effective to normally press the frame against the baseboard, but free to become additionally tensioned from the force-of a shock, permitting the frame to rock away from the baseboard, on said pivot-support, and prevent the machine ,from tearing the anchorages out of the baseboard.

13. In a portable typewriting machine having a frame and a weakbaseboard for supportingthe same, said baseboard forming part of a transporting case, the combination with a pivot-support secured to the baseboard, for said frame to swing upon, of resilient anchorages includin tensioned spiral springs, apertured extensions on the frame upon whlch the springs bear, and headed compression-adjusting screws passing through the springs and the apertures in the extensions into anchorages provided in the baseboard and effective to co-operate with said pivot-support to lock the machine detachably to the baseboard, and also effective to put the springs under regulatable compression under the eads of the screws to resiliently holdthe frame to the baseboard, the springs being additionally tensioned by the swinging of the machine away from the baseboard.

WILLIAM A. DOBSON. 

